Hose coupling



Feb. 23, 1937. H. mm 2,071,478

HOSE COUPLING Filed July 11, 1936 INYENTOR.

BY 120mm 6. W (is M ATTORNEY.

Patented Feb. 23, 1937 UNITED STATES PATENT OFFICE 5 Claims.

This invention relates to hose couplings and is herein disclosed in somedetail as embodied in one member of an air hose coupling suitable foruse at so-called filling stations.

Hose couplings for any kind of rubber hose, or

similar hose, involve many difficulties. The hose material is yielding,easily out, and often slippery, while the coupling elements mustordinarily be made of metal which is relatively hard and unyielding andusually are provided with sharp edges to grip securely the slipperyhose. While the invention is described as a hose coupling it is usefulfor holding nozzles to hose as well as for coupling lengths of hosetogether. According to the present invention a tube with an expansibleend is inserted'in the open end of the hose, usually after a metalferrule or collar has been placed on the periphery of the hose to keepit from expanding.

A hollow wedge or thrust member is then.

screwed down within the expansible tube to expand it and 'grip the hosebetween the tube and collar.

In the form shown the thrust member carries a thread near its head whichturns on an internal thread on the expansible tube so as to thrust apartthe sides of the expansible end of the tube and cause it to firmly bindthe hose between the tube and the ferrule.

an air hose, a central passage in the thrust member provides an adequateopening for flow of the air coming through the hose, and the head of thethrust member is shown as slotted to receive a screw driver blade forturning it, thus providing an exceedingly simple structure.

Other features and advantages appear.

.In the accompanying drawing,

Figure 1 is a side view of a hose end with a coupling inserted. Figure 2is enlarged end view of the same. Figure 3 is a section on line 3-3 ofFigure 1. Figure 4 is a sectional view of the expansible member.

Figure 5 is a sectional view of the thrust memwill hereinafter In theform shown, which as stated above is for a hexagon member, lies againstthe end '4, with the smooth barrel i6 within the hose and also with itsslotted end i'I projecting further within the hose, preferably wellbeyond the edge l8 of the ferrule I I.

In the form shown the member I3 carries the male threads of a hosecoupling, and, near the end I'I within the hose l0 carries a series ofcol--. lars i9 turned or otherwise formed upon it.

The collars are shown with vertical faces facing the end of the hose i0and with opposite slanting faces 2|, thus giving the collars i9 greatresistance to pulling out.

After the member I3 is pushed home to the position described, theinternal end I1 is expanded.

For this purpose, the user thrusts within the opening 22 of member i3 athrust member 23,

shown as having a lengthwise hollow or passage and with a tapering end24, and then screws the thrust member 23 home by turning it with ascrewdriver blade fitted into its end slot 25 in its head 26.

As the screwdriver turns it carries the tapering end 24, further downcausing it to pry apart the slotted end 11, because the ends 21 of theexpansible member l3 are thick or are bent inwardly to form internalprojections, or carry inward projections 28 which are wedged apart bythe tapering end 24 as the screw driver turns thethrust member thread 29in the thread 28 of the member 13 to force the ends 21 apart. The threadthen locks the thrust memberin place.

The slots 30 of the member l3 usually extend back well within theferrule H and usually cut some collars l9, thus the ends 21 grip thehose l0 against the ferrule ll over a length suflicient to firmly holdthe hose, although, preferably the edges of the collars iii are blunt toavoid cutting the hose.

The size of the hollow or passage in the member 23 will vary with thefluid to be carried by the hose. 7

In the form shown, the head 26 of the member 23 is enlarged and abuts at3| against an internal seat or collar 32 withinthe hexagon collar I3 sothe slot 25 is within the hexagon when screwed home. The coupling, ifdesired, may be removed and used again by closing up the end of theexpanding member preparatory to inserting it in another hose. l

Having thus described one embodiment of the invention in some detail,what is claimed is:

1. In a hose coupling. an expansible member having a slotted end, athrust member adapted to expand the slotted end, and a screw thread onthe expansible member on which the thrust member turns to expand theslotted end.

2. In a hose coupling an expansible member adapted to fit within thehose and having a slotted end, internal projections on the end, a thrustmember having a central passage and adapted to strike the projections toexpand the slotted end end, a ferrule outside the hose, internalprojections on the slotted end, outside collars adjacent the slottedend, a thrust member having a central passage and a tapered end tostrike the projections, and threads on the expansible member on whichthe thrust member turns to cause the slotted end to expand.

5. In a hose coupling an expansible member adapted to fit within thehose, an abutment on the member adapted to fit against the end of thehose. collars surrounding the end of the member and intersected by slotsin the member, a thrust member having a tapered end, a thread on theabutment, a threaded headon the thrust member adapted to fit theabutment thread, and a ferrule on the hose against which some collarsbear and beyond which other collars lie.

ROSS H. WICK.

